The Ab Roller Wheel with Plank Board is a fitness equipment designed for home use, specifically targeting the back and abdominal muscle groups. Made of durable acrylonitrile butadiene styrene material in a sleek black color, this indoor gym machine features 4 wheels for easy maneuverability. The automatic retractable feature of the wheels adds convenience to your workout routine. With a padded and non-slip design, this ab roller from AMZDANCE is perfect for a variety of fitness levels, providing a smooth and comfortable exercise experience.